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  1. /*
  2.  * Copyright (c) 2005 Martin Decky
  3.  * Copyright (c) 2006 Jakub Jermar
  4.  * All rights reserved.
  5.  *
  6.  * Redistribution and use in source and binary forms, with or without
  7.  * modification, are permitted provided that the following conditions
  8.  * are met:
  9.  *
  10.  * - Redistributions of source code must retain the above copyright
  11.  *   notice, this list of conditions and the following disclaimer.
  12.  * - Redistributions in binary form must reproduce the above copyright
  13.  *   notice, this list of conditions and the following disclaimer in the
  14.  *   documentation and/or other materials provided with the distribution.
  15.  * - The name of the author may not be used to endorse or promote products
  16.  *   derived from this software without specific prior written permission.
  17.  *
  18.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28.  */
  29.  
  30. /**
  31.  * @file
  32.  * @brief   Architecture dependent parts of OpenFirmware interface.
  33.  */
  34.  
  35. #include <ofwarch.h>  
  36. #include <ofw.h>
  37. #include <printf.h>
  38. #include <string.h>
  39. #include <register.h>
  40. #include "main.h"
  41. #include "asm.h"
  42.  
  43. /* these tho variables will be set by the detect_subarchitecture function */
  44. extern uint8_t subarchitecture;
  45. extern uint16_t mid_mask;
  46.  
  47. void write(const char *str, const int len)
  48. {
  49.     int i;
  50.    
  51.     for (i = 0; i < len; i++) {
  52.         if (str[i] == '\n')
  53.             ofw_write("\r", 1);
  54.         ofw_write(&str[i], 1);
  55.     }
  56. }
  57.  
  58. int ofw_translate_failed(ofw_arg_t flag)
  59. {
  60.     return flag != -1;
  61. }
  62.  
  63. /**
  64.  * Starts all CPUs represented by following siblings of the given node,
  65.  * except for the current CPU.
  66.  *
  67.  * @param child     The first child of the OFW tree node whose children
  68.  *          represent CPUs to be woken up.
  69.  * @param current_mid   MID of the current CPU, the current CPU will
  70.  *          (of course) not be woken up.
  71.  * @return      Number of CPUs which have the same parent node as
  72.  *          "child".
  73.  */
  74. static int wake_cpus_in_node(phandle child, uint64_t current_mid)
  75. {
  76.     int cpus;
  77.     char type_name[BUF_SIZE];
  78.    
  79.     for (cpus = 0; child != 0 && child != -1;
  80.         child = ofw_get_peer_node(child), cpus++) {
  81.         if (ofw_get_property(child, "device_type", type_name,
  82.             sizeof(type_name)) > 0) {
  83.             if (strcmp(type_name, "cpu") == 0) {
  84.                 uint32_t mid;
  85.                
  86.                 /*
  87.                  * "upa-portid" for US, "portid" for US-III,
  88.                  * "cpuid" for US-IV
  89.                  */
  90.                 if (ofw_get_property(
  91.                     child, "upa-portid",
  92.                     &mid, sizeof(mid)) <= 0
  93.                     && ofw_get_property(child, "portid",
  94.                     &mid, sizeof(mid)) <= 0
  95.                     && ofw_get_property(child, "cpuid",
  96.                     &mid, sizeof(mid)) <= 0)
  97.                     continue;
  98.                    
  99.                 if (current_mid != mid) {
  100.                     /*
  101.                      * Start secondary processor.
  102.                      */
  103.                     (void) ofw_call("SUNW,start-cpu", 3, 1,
  104.                         NULL, child, KERNEL_VIRTUAL_ADDRESS,
  105.                         bootinfo.physmem_start |
  106.                         AP_PROCESSOR);
  107.                 }
  108.             }
  109.         }
  110.     }
  111.  
  112.     return cpus;
  113. }
  114.  
  115. /**
  116.  * Finds out the current CPU's MID and wakes up all AP processors.
  117.  */
  118. int ofw_cpu(void)
  119. {
  120.     int cpus;
  121.     phandle node;
  122.     phandle subnode;
  123.     phandle cpus_parent;
  124.     phandle cmp;
  125.     char name[BUF_SIZE];
  126.  
  127.     /* get the current CPU MID */
  128.     uint64_t current_mid;
  129.    
  130.     asm volatile ("ldxa [%1] %2, %0\n"
  131.         : "=r" (current_mid)
  132.         : "r" (0), "i" (ASI_ICBUS_CONFIG));
  133.     current_mid >>= ICBUS_CONFIG_MID_SHIFT;
  134.  
  135.     current_mid &= mid_mask;
  136.  
  137.     /* wake up CPUs */
  138.    
  139.     cpus_parent = ofw_find_device("/ssm@0,0");
  140.     if (cpus_parent == 0 || cpus_parent == -1) {
  141.         cpus_parent = ofw_find_device("/");
  142.     }
  143.  
  144.     node = ofw_get_child_node(cpus_parent);
  145.     cpus = wake_cpus_in_node(node, current_mid);
  146.     while (node != 0 && node != -1) {
  147.         if (ofw_get_property(node, "name", name,
  148.             sizeof(name)) > 0) {
  149.             if (strcmp(name, "cmp") == 0) {
  150.                 subnode = ofw_get_child_node(node);
  151.                 cpus += wake_cpus_in_node(subnode,
  152.                     current_mid);
  153.             }
  154.         }
  155.         node = ofw_get_peer_node(node);
  156.     }
  157.    
  158.     return cpus;
  159.    
  160. }
  161.  
  162. /** Get physical memory starting address.
  163.  *
  164.  * @param start     Pointer to variable where the physical memory starting
  165.  *          address will be stored.
  166.  *
  167.  * @return      Non-zero on succes, zero on failure.
  168.  */
  169. int ofw_get_physmem_start(uintptr_t *start)
  170. {
  171.     uint32_t memreg[4];
  172.  
  173.     if (ofw_get_property(ofw_memory, "reg", &memreg, sizeof(memreg)) <= 0)
  174.         return 0;
  175.  
  176.     *start = (((uint64_t) memreg[0]) << 32) | memreg[1];
  177.     return 1;
  178. }
  179.  
  180.